Educational device.



No. 853,042. EATENTEEMAY 7, 1907.

Inv/111114vv .Educational Devices; and I UNITED STATES PATENT OEEi-OE.

JOHN THOMSON, OFWILKINSBURG, PENNSYLVANIA.`

EDUCATIONAL4 DEVICE.

Speccationvof Letters Patent.

zratented May "2', 1907.

Application filed December 3, 1906. Serial No. 346.033.

To ai-ZZ 4l/'hom t may concern: Be it known that I, JOHN THOMSON, a

resident of Wilkinsburg, n the county of' .Allegheny and State of Pennsylvania, have invented a new and useful Im rovementvin o hereby declare'the following to be a full, clear, and

exact description thereof.

This invention relates tO an educational device, and more especially `to a device usedv subjects wherein chart or blackin teachin board worl is Ordinarily employed.

The object of the invention is to provide a device or this purpose which isA simple of construction, easy to use,- whereby various subjects may be taughtv and whereby'the amount of instructing material exposed to view may be varied:

In the accompanying drawing Figurefl isa front or face view o my device; Fig. 2 is a view of one end thereof; Fig. 3 is a view of the 4other end; Fig., 4 isI a vertical section therethrough on vthe line 4 4, Fig. l; Fig. 5

is a detail ot4 the'rollers and Fig. 6 is an end view showing a modification. c -1 My device comprises a suitable` frame,

preferably -rectangular as shown, havingside vided with a slot 7 -for receiving an end 8 of A and conceal-the ollers drawn upon the chart or sheet.

piecesv 1., top piece 2, and bottom piece l3. `In this `frame 1s mounted a suitable upper roller .4 and lower roller 5l for carrying the tape,

sheet or chart 6, these rollers being so arran ed that the chart or sheet can befrolled bacward and orward from one to theother, as will be readily gathered from Fig. 4, so as The ends of the chartl or's'heetmay be at tached to thelrollers in any suitable way. For this purpose I have shown the roller prothe chart Or sheet.

On 'the front of the device, both at top and bottom', I\p'rovide ..the face or covering strips or boards 9 and 10 respectively, vwhich cover these top and bottom boards'is intended for exposingI the matterjjprinted, written or In teaching diierent subjects or4 even in teaching the Asame subject, itisfrequently desirable to eX- f jectmatter on the chart or sheet. vem'ently do-ths I'provide a'movable shutterv pose algreater orv lesser amount of the sub- To conor shutters. twosuch shutters being shown and'numbered 11 and 1-2 respectively, one atvv the'top and one at the bottom. The'seshut-4 The space between ters are independently movable so thatl one may be movedor opened to expose more of the chart or sheet while the other isin' a closed position, so that either one, or both may be Olpen or closed as indicated in Fig. 4. These s utters may be mounted in various ways so as tobe movable. I haveshown them'conne'cted respectively to',\the top and bottom faceboards 9 and 10 bymeansl of hinges 14 whereon they can be swung to closed or open position, to conceal or expose the chart or sheet. Suitable means are also provided for holding these shutters in both open and closed position, such as the spring catches 15, or'ordinary spring snap lfastener 16'. Vari Vous other devices will adapt themselves for this pur o'se.

f In or er to enable the chart or sheet to be prepared `or altered While in position in the device, I lprovide a suitable printing table or backing board 18, preferably removably secured to the si'des'ofv the frame 1, as by means of catches 19, and lyingjust behind the exposed said backing oard serving as a rest or table so that the teacher'can write, print or draw upon the chart or sheet While it is in position.

In order to ada `t the same device for lteaching various su jects the rollers 4 and 5 are so mounted'in the frame as to be readily 5 removed With thechart or sheet rolled thereon.. This may be accomplished in various ways. provided wit jecting into holes 21 in one of the side frames,

In Figs. 1 to 4 the rollers are shown ortion of the chart or sheet,

journalsl 20 at one'end prof.

and at the o posite end 'with extended j'our-v nals 22 'provided with knobs or hand wheels 23. for rotating the rolls. The journals 22 en-L ter notches '24 cut into the other side frame from one edge and the rollers are held in position by a resilient bearing member -conslst.- in of a wire or small rod 25 having one 'end sultably secured to the frame, as at 26', and.

'swung out of the way to permit the removal ofthe roller. The resiliency of this wire enables the same to form a friction bearlng for the rollers, or. in other words, to act as a frlc- In order to remove the roller it is IOO IIO

lknobs or hand wheels. 'member in this case is shown at 3 0 as of i used in teaching many subjects. v to hand'le ami very greatly reduces the labor of the teacher when following certain methboard.

ltem t has been mace to .describe the various ti'on brake so as to vpreventthe rollers from rotating idly and unreeling the chart or sheet Wound thereon.

Fig. 6 shows a modification wherein notches 24ab are cut into the ends of the frame ,instead of in from the edge.

This enables both ends of the'rollers to be provided with he spring bearing slightly different shape than in then other views, but acting exactly in the same way.

In the'use of. the device, .i roller with a l chart or sheet Wound thereon is inserted in one end oi the frame and tire end of the chart or lsheet drawn over the backing board 18, or the backing board can be removed if desired) and attached to the other roller, When, by rotating the latter, the chart or sheet can be Wound-upon the latte'r roller and unwoiind` from the first roller. The chart or sheet can be .moved-backwardly or forwardly as often or to as great an extent as desired. When it is desired to change the subject, the -chart or sheet will be rolled onto one of the rollers and thisroller removed and re laced by a similar roller having thereon a c art or; sheet containing diiierent subject matter. If it is desired or necessary to expose only a small portion ofthe chart or sheet, both ofthe shutters 11 and 12 Will. be held in closed osition,

thus exiposing only, say a line of rea ing matter.l more than a single-line is intended to be exposed, one of the shutters can be opened and if still more is to be exposed,'the other shutter also can be opened. Should the teacher desire to alter or add to the matter on the sheet or chart, this can be readily -done while i-n place in the device, as the backing board 18 acts as a table. y

The devicedescribed iscapable of being ods `required at the present time and in Which v 45 ,it is necessary to practically put'all of the Work, es ecially sight Work, upon a blackn the' fore oing specification, no atsubjects or the various uses to Which the device can be applied.A Y

It is easy.

portions forming bearings and brakes for theA roller 'ournala 3. educational 'device comprising` a frame provided with slots, chart or sheet carrying rollers having journals. located in said slots, and spring., members pivoted to the frame and-'each provided/with a bend bearing against a /roll 'ournal and provided with means at the en for securing to the frame.

4'. An educational device comprising a frame, chart or sheet carrying rollers mounted in said frame, Va printing table'in the frame back' of the chart or sheet, and catches detachably securing said printing table to vsaid frame. 5. educational device comprising a frame open at its rear, chart or sheet carrying .rollers mounted in said Jframe, and a prin'tin table`detachably secured to the frame an removable through the open back oi theSc 6. An educational device comprising aframe, chart or sheet carrying rollers mount-l and a shutter or shutters ed in said frame,

hinged to the frame on pivots parallel to the` axes of the rollers and permitting the exposure of a greater-or lesser portion'oi` the chart or sheet. 1

7; An educational -device comprising a frame, chart or sheet carrying rollers mount- -ed in said frame, a shutter or shutters -hinged on the frame onl pivots arallel to the axes oi l the rollers and permitting 'the exposure .of a

greater or lesser portion oi the chart or sheet, v and means for securing said shutters in both closed and open positions.

8, An jeducational device icomprising a. l

frame, chart or sheet carrying rollers .removably mounted in said frame, a movable shutter or shutters onlthe frame parallel to the axes ofthe rollers and permitting the exposure of a greater or lesser portion of the chart or sheet, and a printingtable in the frame back oi the portion-of thel 'chart or sheet which'isex osed by'said shutters. A

' 9. An e ucational device comprising -a frame-, chart or sheet carrying rollers'mounted insaid frame, spring members movablyesecured -to the frame and having looped portionsformingbearings for the journals of said rollers, anda movable shutter or shutters on the frame permitting the exposure of a'greater orlesser 'portion of the chart or' Sheet.

`In testimony whereof, Iv the said JOHN .y "Tiloiaso-N have hereunto set my hand.

JOHN` THOMSON. l Witnesses; A j

G. H.. RANK'IN, F. W. WINTER. 

